Rounded corners in body > div. Handle narrow width. Disable buttons during auto-step.  Fix README link.  Add compiled js to .gitignore.
Add Firefox compatibility.
Toggle CodeMirror readonly support.  Combine setup.coffee with metajs.coffee.
Remove coffee-script-iced.large.js
Load CodeMirror as early as possible.  Disable run during auto-step (which causes an error).
Merge pull request #7 from omphalos/browser-fixes

Miscellaneous fixes